Motor-cycle.



No. 670,590. Patented Mar. 26, l90l.

G. M. HOLLEY. v

MOTOR CYCLE.

(Application filed Oct. 19,- 1900. I No Model.) 2 Shee*s$heat I.

' 775%65565: fi/My Invert/'2 No. 670,590. Patented Mar: 26, l90l.

a. M. HOLLEY.

MOTOR CYCLE.

(Application filed Oct. 19, 1900.1 (No Model.) 2 Sheets-Sheet 2.

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Fete x PATENT GEORGE M. HOLLEY, OF BRADFORD, PENNSYLVANIA.

MOTO R-CYC LE.

SPECIFICATION forming part of Letters Patent No. 670,590. dated March 26, 1901.

Application filed October 19, 1900. Serial No. 33.571. \No model.)

To a, whom it may concern:

Be it known that I, GEORGE M. HOLLEY, a citizen of the United States, residing at Bradford, in the county of McKean and State of Pennsylvania,,have invented new and useful Improvements in Motor-Cycles, of which the following is a specification. I

This invention relates more particularly to that class of motor cycles or velocipedes in which a gas-engine is employed.

The object of this invention is to provide a motor-cycle of this character which is very compact and simple in construction and which can be readily combined with the foot driving mechanism of the cycle.

In the accompanying drawings, consisting of two sheets, Figure 1 is a side elevation of my improved motor-cycle. Fig. 2 is a fragmentary horizontal section of the same on an enlarged scale in line 2 2, Fig. 1. Fig. 3 is a fragmentary vertical longitudinal section, on an enlarged scale of the motor and foot driving mechanism. Fig.4is a vertical transverse section in line 4 4, Fig. 3.

Like letters of reference refer to like parts in the several figures.

A A represent front and rear Wheels of a bicycle or velocipede, which may be of anysuitable construction. The front wheel A is journaled in the lower end of the fork B, which latter is pivoted at its upper end, as usual, in the steeringhead I) of the main frame and provided with a handle-bar b. The rear Wheel A is mounted on the lugs c at the rear ends of the upperand lower forks C O.

D represents the usual seat-cluster, which receives the shank of the seat 9 and which is connected on its rear side with the upper end of the upper fork C, while its front side is connected with the upper end of the steeringhead by the usual upper bar 6 of the main frame.

F represents the crank box or case, in which the crank-shaft G of the gas-m otoris mounted. This box consists of a cylindrical 'or peripheral wall f, which has its axis arranged horizontally and transversely, and two vertical heads or plates f f of circular form, which are secured to opposite ends of the peripheral wall by bolts f The peripheral wall of the motor crank-box is provided on its rear side with a tubular nipple h, which projects rear- "i, whichis connected bythelower inclined bar' or reach I of the main frame with the lower end of the steering-head.

J represents an upright bifurcated brace forming part of the main frame and connecting the motor crank-box and the seat-cluster. This brace consists of a single upper barj and two lower barsjj, which, are connected at their upper ends by a crown j with the lower end of the upper bar. The latter is secured with its upper end to the lower side of the seat-cluster: The lower bars jj of the brace are arranged one behind the other and secured at their lower ends to nipples k k, which are arranged on the upper side of the motor crankboX in front and in rear of the vertical center thereof,

The crank-shaft Gisjournaled transversely in bearings g gin the heads of the crank-box F and is provided within the latter with two crank-disks g g, which are connected by a crank-wrist Motion is transmitted from the crank-shaft to the rear or driving wheel by a chain belt Z, passing around sprocketwheels Z Z secured to corresponding ends of the motor crank-shaft and the hub of the driving-wheel.

M represents the cylinder of the gas engine or motor whereby the cycle is driven. This cylinder is arranged substantially vertically between the front and rear bars of the bifurcated brace and is secured with its lower open end to the upper end of a nipple m, which projects upwardly from the upper side of the motor crank-box between the brace-nipples It 10 thereof.

N represents the piston,arran god in the cylinder and connected by a p'itman or connecting-rod n with the wrist g of the crank-disks.-

or firing end of the cylinder, a spring-pressed fuel-valve p, which controls a fuel-inlet port 1), and an exhaust-valve Q, which controls an exhaust-port q. The exhaust-valve is normally closed by a spring q, bearing against the exhaust-valve rod The exhaust-valve is opened once during every second backward stroke of the piston by a cam 0", arranged on a counter-shaft r and engaging with the exhaust-valve rod and an internieshing gearpinion r and a wheel r which have a relation of two turns of the pinion to one of the gear-wheel and which are secured, respectively, to the motor crank shaft and the coun tor-shaft, as shown in Fig. 4. During each cycle of operations of this engine a charge of fuel is drawn into the cylinder while the piston makes its first forward stroke, which charge is compressed during the next following backward stroke, exploded during the next forward stroke by an igniter of any suitable construction, and during the subsequent backward stroke the exhaust-valve is opened to discharge the products of combustion.

S represents the pedal crank-shaft,provided on the cranks s s at its ends with the usual pedals s. T represents the crank box or case, in which the pedal crank-shaft S is journaled transversely by means of bearings 11 t. The pedal crank-box is arranged in front of the motor crank-box below the lower reach I and connected with the motor crank-box by a short neck or nipple The neck 8 and the two crank-boxes connected thereby are preferably formed integrally, as shown in Figs. 2 and 3. U represents a driving-chain which passes around sprocket-wheels 'u, u, arranged on the opposite ends of the pedal crank-shaft and the hub of the rear or driving wheel. This construction of a driving mechanism for a cycle applies the power for driving the cycle at the strongest part of the frame and at a point whereby the rider suffers the minimum discomfort from the heat of the engine. By applying the power at the junction of the lower bar, fork, and seat-brace the weight of the motor is placed comparatively low, thereby producing a more perfect balance and avoiding undue vibrations. The arrangement of the cylinder between the divided lower part of the brace permits the motor to be built into the cycle very compactly and also produces a neat appearance of the cycle.

I claim as my invention- 1. In a motor-cycle, the combination with the crank-box and the cylinder of an engine, of a cycle-frame having a member which is bifurcated at its lower end, the branches of said bifurcated member being arranged on opposite sides of said cylinder and connected at their lower ends with the crank-box, sub stantially as set forth.

2. In a motor-cycle, the combination with a cycle-frame having a lower front bar, a lower rear fork, a crank-box connected on its front and rear sides with the adjacent ends of said front bar and rear fork, and an upright bifurcated brace having its two parts arranged one behind the other and connected with the top of the crank-box, of an engine-cylinder arranged between the parts of the bifurcated brace and connected with the upper side of the crank-box, substantially as set forth.

3. In a motor-cycle, the combination with a cycle-frame having a lower front bar, a lower;

rear fork, a, crank-box connected on its front and rear sides with the adjacent ends of said front bar and rear fork, and an upright bifurcated brace having its two parts arranged one behind the other and connected with the top of the crank-box, of an engine-cylinder arranged between the parts of the bifurcated brace and connected with the upper side of the crankboX, heads secured to opposite sides of the crank-boX, a crank-shaft journaled in hearings in said heads and having its crank arranged in said crank-box, a piston arranged in the cylinder and connected with said crank, and an intermediate transmitting mechanism connecting the crankshaft with the driving-wheel of the cycle, su b stantially as set forth.

4:. In a motor-cycle, the combination with a cycle-frame having a lowerfront bar, a lower rear fork, a crank-box connected on its front and rear sides with the adjacent ends of said lower bar and lower fork, and an upright bifurcated brace having its two parts arranged one behind the other and connected with the top of the crank-box, of an engine-cylinder arranged between the parts of the bifurcated brace and connected with the upper side of the crank-box, a motor crank-shaft journaled in the motor crank-box and having its crank connected with the piston in the cylinder, a pedal crank-box mounted on the front side of the motor crank-box, a pedal crank-shaft journaled in the pedal crank-box, a transmitting mechanism arranged on one side of the cycle-frame and connecting the corresponding ends of the motor crank-shaft and the hub of the driving-wheel, and another transmitting mechanism arranged on the opposite side of the cycle-frame and connecting the corresponding ends of the pedal crank-shaft and the hub of the driving-wheel, substantially as set forth.

Witness my hand this 5th day of October, 1900.

GEORGE M. HOLLEY.

Witnesses:

FRANK C. WHITTING, THOMAS J. MELVIN, Jr.

IIO 

